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The detections of inflowing gas from narrow absorption lines at the parsec scale
Zhi-Fu Chen, Minfeng Gu, Zhicheng He +4
Inflows at the dusty torus and smaller scales is crucial to investigate the process of supermassive black hole accretion. However, only few cases of inflowing gas at small scales h…
Detection of a Parsec-Scale Jet in a Radio-Quiet Narrow-Line Seyfert 1 Galaxy with Highly Accreting Supermassive Black Hole
Su Yao, Xiaolong Yang, Minfeng Gu +7
The jet in active galactic nuclei (AGN) is a key ingredient in understanding the co-evolution of galaxies and their central supermassive black holes (SMBHs). Unfortunately, the mec…
Event Horizon Telescope observations of the jet launching and collimation in Centaurus A
Michael Janssen, Heino Falcke, Matthias Kadler +236
Very-long-baseline interferometry (VLBI) observations of active galactic nuclei at millimeter wavelengths have the power to reveal the launching and initial collimation region of e…
Investigations on the optical properties and X-ray emission in compact radio AGN
Mai Liao, Minfeng Gu
Compact radio active galactic nuclei (compact radio AGN) are compact ( 20 kpc), powerful radio sources. Currently, the preferred scenario is that they are at the early stage…
Optical variability of a newly discovered blazar sample from the BZCAT Catalog
Nibedita Kalita, Alok C. Gupta, Minfeng Gu
In an optical monitoring program to characterize the variability properties of blazar, we observed 10 sources from the Roma-BZCAT catalogue for 26 nights in V and R bands during Oc…
The origin of X-ray emission in 3CRR sources: hints from mid-infrared Spitzer observations
Shuang-Liang Li, Minfeng Gu
Whether X-ray emission in radio-loud (RL) active galactic nuclei (AGNs) originates from disk coronae or jets is still under debate. For example, the positive relationships in radio…